From 59d1b762a42c900c67f5e5ae76ff07f0dfd5b6f2 Mon Sep 17 00:00:00 2001
From: Roland Dreier <roland@purestorage.com>
Date: Mon, 16 Jul 2012 15:34:22 -0700
Subject: [PATCH] --- yaml --- r: 312695 b: refs/heads/master c:
 2594e29865c291db162313187612cd9f14538f33 h: refs/heads/master i:   312693:
 14a1894e4a04d64c1f27b9ba7c825cd463939965   312691:
 a0fdf169ab3c6a9ab1873b1b97c54fe5956a6bfc   312687:
 d8f74a32292a54e1d01d74ee632903b09d6609e1 v: v3

---
 [refs]                                    |  2 +-
 trunk/drivers/target/target_core_iblock.c | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index e89d78b9222d..678b3c88f4c1 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e2397c704429025bc6b331a970f699e52f34283e
+refs/heads/master: 2594e29865c291db162313187612cd9f14538f33
diff --git a/trunk/drivers/target/target_core_iblock.c b/trunk/drivers/target/target_core_iblock.c
index 8a12e29009c1..8fb3822bad55 100644
--- a/trunk/drivers/target/target_core_iblock.c
+++ b/trunk/drivers/target/target_core_iblock.c
@@ -348,6 +348,18 @@ static int iblock_execute_unmap(struct se_cmd *cmd)
 		pr_debug("UNMAP: Using lba: %llu and range: %u\n",
 				 (unsigned long long)lba, range);
 
+		if (range > dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count) {
+			cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+			ret = -EINVAL;
+			goto err;
+		}
+
+		if (lba + range > dev->transport->get_blocks(dev) + 1) {
+			cmd->scsi_sense_reason = TCM_ADDRESS_OUT_OF_RANGE;
+			ret = -EINVAL;
+			goto err;
+		}
+
 		ret = blkdev_issue_discard(ibd->ibd_bd, lba, range,
 					   GFP_KERNEL, 0);
 		if (ret < 0) {